Eruption history
VEI – Volcanic Explosivity Index: 0 = lava outpouring, 4 = like Eyjafjallajökull 2010, 6 = like Pinatubo 1991, 7 = like Tambora 1815. The scale is logarithmic – each step is about 10 times more material.
| Start | End | VEI | Vent and dating |
|---|---|---|---|
| 15 July 1974 | — | 3 | SW flank · Observations: Reported |
| 13 November 1968 | 13 November 1968 | 3 | SW flank · Observations: Reported |
| 5 September 1967 | 25 February 1968 | 3 | SW flank · Observations: Reported |
| c. 2 July 1966 | — | 0 | SW flank · Observations: Reported |
| 31 May 1964 | — | 3 | SW flank · Observations: Reported |
| 17 October 1963 | 17 November 1963 | 3 | SW flank · Observations: Reported |
| 1 April 1963 | 3 April 1963 | 3 | SW flank · Observations: Reported |
| 9 June 1962 | 9 June 1962 | 3 | SW flank · Observations: Reported |
| 30 June 1961 | — | 2 | SW flank (1100 m) · Observations: Reported |
| 2 July 1957 | 10 August 1960 | 2 | SW flank · Observations: Reported |
| 8 September 1956 | 9 September 1956 | 2 | Volcano Uncertain: attributed to Trident |
| 15 February 1953 | 5 October 1954 | 3 | SW flank (1100 m) · Observations: Reported |
| 2 July 1950 | 18 August 1950 | 2 | Volcano Uncertain: attributed to Trident |
| 16 June 1949 | — | ? | Observations: Reported |
| 16 September 1913 | — | 1 | Observations: Reported |
Data: Global Volcanism Program, Smithsonian Institution (#312160)